Ironmaking - Mineral Processing and Extractive Metallurgy - Metallurgical Engineering Previous Year Questions

1

2007 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2007

The primary source of heat in cupola melting is provided by the reaction:

A

\(C + O_2 \rightarrow CO_2\)

B

\(C + H_2O \rightarrow CO + H_2\)

C

\(C + CO_2 \rightarrow 2CO\)

D

\(CaCO_3 \rightarrow CaO + CO_2\)

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2

2007 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2007

Identify the correct statement with reference to blast furnace iron making.

A

Hematite is reduced to magnetite in the lower part of the shaft

B

Coke rate cannot be improved by oil injection through tuyer

C

High exit gas temperature may be an indication of “channeling”

D

Pressure drop in blast furnace cannot be improved by proper burden distribution

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3

2007 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2007

Match the process in group I to its description in group II.

Group-I	Group-II
(P) COREX process	(1) decarburization of liquid steel
(Q) OBM process	(2) steelmaking using oxygen
(R) Carbonyl process	(3) nickel refining
(S) AOD process	(4) alternative route of liquid iron production

A

P-4, Q-2, R-3, S-1

B

P-3, Q-1, R-2, S-4

C

P-1, Q-4, R-3, S-1

D

P-2, Q-1, R-3, S-4

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4

2007 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2007

The weight of the ore used per ton of pig iron is

A

3.0 tons

B

1.7 tons

C

1.0 tons

D

0.5 ton

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5

2007 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2007

The weight of the slag made per ton of pig iron is

A

821 kg

B

735 kg

C

633 kg

D

450 kg

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6

2007 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2007

The volume (at NTP) of the blast furnace gas produced per ton of pig iron is

A

3789 m³

B

4256 m³

C

5797 m³

D

7234 m³

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7

2008 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2008

High top pressure in the blast furnace

A

decreases the time of contact between gas and solid

B

increases the time of contact between gas and solid

C

increases fuel consumption

D

increases the rate of solution loss reaction

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8

2008 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2008

Volume of the exit gas (at 1 atm pressure and 273 K) in m³ is

A

2129

B

2252

C

2628

D

2923

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9

2008 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2008

Stoichiometric amount of air used (at 1 atm pressure and 273 K) in m3 is

A

1010

B

1394

C

1520

D

2020

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10

2009 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2009

Match the practices in Group 1 with reactors in Group 2.

Group 1	Group 2
P. Layered charging of coke and ore	1. Ladle furnace
Q. Oxygen injection through supersonic nozzle	2. Electric arc furnace
R. Aluminium wire feeding	3. Blast furnace
S. Foamy slag practice	4. LD converter

A

P-3, Q-1, R-2, S-4

B

P-2, Q-4, R-3, S-1

C

P-4, Q-3, R-2, S-1

D

P-3, Q-4, R-1, S-2

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11

2009 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2009

A blast furnace is charged with pure Fe₂O₃. For each ton of Fe produced, it discharges 700 kg of CO₂ and 450 kg of CO as top gas. The O₂ consumed, per ton of Fe produced, is

A

138 kg

B

238 kg

C

338 kg

D

438 kg

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12

2010 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2010

Match the metallurgical processes in Group I with their corresponding reactors types in Group II.

A

P-3, Q-2, R-4, S-1

B

P-4, Q-1, R-3, S-2

C

P-3, Q-4, R-2, S-1

D

P-4, Q-1, R-2, S-3

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13

2010 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2010

Group I is a list of technologies for alternate methods of producing iron. Group II is a list of terms you come across in the context of these technologies. Match the items.

A

P-3, Q-1, R-2, S-4

B

P-4, Q-2, R-1, S-3

C

P-1, Q-3, R-2, S-4

D

P-4, Q-3, R-2, S-1

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14

2011 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2011

Humidification of the blast in the iron blast furnace leads to

A

Lowering of the raceway temperature

B

Increase in raceway temperature

C

Difficulty in pulverized coal injection (PCI)

D

Decrease of the oxygen content in the hot metal

Check answer

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15

2011 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2011

The amount of oxygen in CO and CO₂ leaving with the top gas is

A

293 kg

B

407 kg

C

700 kg

D

1050 kg

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16

2011 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2011

The CO/CO₂ molar ratio in the top gas is

A

0.9

B

1.0

C

1.1

D

1.5

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17

2013 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2013

High top pressure in a blast furnace operation

A

favours the solution-loss reaction

B

suppresses the solution-loss reaction

C

decreases gas-solid contact time

D

increases coke rate

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18

2013 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2013

The permeability of burden in an ironmaking blast furnace can be improved by using

A

fine charge

B

agglomerated charge

C

oxygen enriched air blast

D

pulverized coal injection through the tuyeres

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19

2014 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2014

What is the theoretical requirement of air (in m³) at STP) for the complete combustion of 100 m³ (at STP) of a fuel consisting of pure \(CH_4\)? Assume that air contains 21 vol.% of oxygen. ______

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20

2014 · Metallurgical Engineering · Mineral Processing and Extractive Metallurgy · Ironmaking

Metallurgical Engineering (MT) 2014

Match the operations listed in Group I with the types of processes listed in Group II.

Group I	Group II
P. Blast Furnace Ironmaking	1. Refining
Q. BOF Steelmaking	2. Electrolysis
R. Hall-Heroult Process	3. Smelting
S. Bayer Process	4. Leaching

A

P-1, Q-3, R-2, S-4

B

P-3, Q-1, R-2, S-4

C

P-4,Q-2, R-3, S-1

D

P-3, Q-1, R-4, S-2

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